    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *     http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017
    018package org.apache.commons.configuration2;
    019
    020import java.util.Iterator;
    021
    022/**
    023 * Strict comparator for configurations.
    024 *
    025 * @since 1.0
    026 *
    027 * @author <a href="mailto:herve.quiroz@esil.univ-mrs.fr">Herve Quiroz</a>
    028 * @author <a href="mailto:shapira@mpi.com">Yoav Shapira</a>
    029 * @version $Id: StrictConfigurationComparator.java 1842194 2018-09-27 22:24:23Z ggregory $
    030 */
    031public class StrictConfigurationComparator implements ConfigurationComparator
    032{
    033    /**
    034     * Create a new strict comparator.
    035     */
    036    public StrictConfigurationComparator()
    037    {
    038    }
    039
    040    /**
    041     * Compare two configuration objects.
    042     *
    043     * @param a the first configuration
    044     * @param b the second configuration
    045     * @return true if keys from a are found in b and keys from b are
    046     *         found in a and for each key in a, the corresponding value
    047     *         is the sale in for the same key in b
    048     */
    049    @Override
    050    public boolean compare(final Configuration a, final Configuration b)
    051    {
    052        if (a == null && b == null)
    053        {
    054            return true;
    055        }
    056        else if (a == null || b == null)
    057        {
    058            return false;
    059        }
    060
    061        for (final Iterator<String> keys = a.getKeys(); keys.hasNext();)
    062        {
    063            final String key = keys.next();
    064            final Object value = a.getProperty(key);
    065            if (!value.equals(b.getProperty(key)))
    066            {
    067                return false;
    068            }
    069        }
    070
    071        for (final Iterator<String> keys = b.getKeys(); keys.hasNext();)
    072        {
    073            final String key = keys.next();
    074            final Object value = b.getProperty(key);
    075            if (!value.equals(a.getProperty(key)))
    076            {
    077                return false;
    078            }
    079        }
    080
    081        return true;
    082    }
    083}